diff --git a/zshrc b/zshrc
index 1ed03b0..9fe4c58 100644
--- a/zshrc
+++ b/zshrc
@@ -77,21 +77,23 @@ autoload -U edit-command-line
 zle -N edit-command-line
 bindkey -M vicmd '^V' edit-command-line
 
+# Get the shells parent process name.
+ppid_name() { echo $(ps -p $(ps -p $(echo $$) -o ppid=) -o comm=) }
+
 # Enable changing cursor shape based on vi mode
-if [ "$TMUX" != "" ]; then
-  tmux_before="\EPtmux;\E"
-  tmux_after="\E\\"
+if [ "$ITERM_PROFILE" != "" ]; then
+  # TODO: This only works outside tmux, unlike VTE compatible terminals I've
+  # not found a tmux terminal-override which works with iTerm2's CursorShape
+  # escape sequences.
+  # iTerm2 cursor shape escape sequences
+  cursor_block="\E]50;CursorShape=0\C-G"
+  cursor_line="\E]50;CursorShape=1\C-G"
+elif [ "$(ppid_name)" != "python2" ]; then
+  # VTE compatible cursor shape escape sequences, excluding Guake even though
+  # it is VTE based it doesn't seem to handle these properly
+  cursor_block="\e[2 q"
+  cursor_line="\e[6 q"
 fi
-if [ "$ITERM_SESSION_ID" != "" ]; then
-  # iterm2 cursor shape escape sequences
-  cursor_block="$tmux_before\E]50;CursorShape=0\C-G$tmux_after"
-  cursor_line="$tmux_before\E]50;CursorShape=1\C-G$tmux_after"
-else
-  # VTE compatible cursor shape escape sequences
-  cursor_block="$tmux_before\E[2 q$tmux_after"
-  cursor_line="$tmux_before\E[6 q$tmux_after"
-fi
-unset tmux_before tmux_after
 
 if [[ ! -z "$cursor_block" && ! -z "$cursor_line" ]]; then
   # Change cursor shape when vi mode changes